Subdivision surface creates thorn-like artifact/curve (Blender 2.8)
So I solved the issue, but I still don't know what caused it. I selected the whole mesh, and deleted loose. That gave me a face with 6 vertices. Creating an edge by selecting the two middle vertices and pressing f recreated the issue; However, using the knife tool to cut the new face solved the issue. I somebody knows what this means, please let me know. Thanks.